I've got an 86 c 10 with a 350 out of an89 camaro. I had the passenger side head off to repair a broken rocker stud. After putti g the head back on the coolant doesn't return to the radiator from the overflow bottle. I tried a new radiator cap but that didn't help. Could i have possibly screwed up when I replaced the head bolts? I put the two shorter bots into the holes with the raised bosses. Can anybody enlighten me on this. Thanks rick